Clarence Seward Darrow (April 18, 1857 - March 13, 1938)
According to Wikipedia, Darrow "was an American lawyer and leading member of the American Civil Liberties Union, best known for defending teenage thrill killers Leopold and Loeb in their trial for murdering 14-year-old Bobby Franks (1924) and defending John T. Scopes in the so-called "Monkey" Trial (1925), in which he opposed the statesman William Jennings Bryan. He remains notable for his wit, compassion, and agnosticism that marked him as one of the most famous American lawyers and civil libertarians....
"The Scopes Trial of 1925 pitted against each other lawyers William Jennings Bryan and Clarence Darrow (the latter representing teacher John T. Scopes) in an American court case that tested a law passed on March 13, 1925, which forbade the teaching, in any state-funded educational establishment in Tennessee, of 'any theory that denies the story of the Divine Creation of man as taught in the Bible, and to teach instead that man has descended from a lower order of animals.'"